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Mon, 16 Sep 2019 10:57:31 -0700 Subject: Re: BUG: unable to handle kernel NULL pointer dereference in rds_bind To: Cong Wang , syzbot Cc: Arvid Brodin , David Miller , LKML , linux-rdma@vger.kernel.org, Linux Kernel Network Developers , rds-devel@oss.oracle.com, syzkaller-bugs References: <000000000000bd36db0592ab9652@google.com> From: santosh.shilimkar@oracle.com Organization: Oracle Corporation Message-ID: Date: Mon, 16 Sep 2019 10:57:30 -0700 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:60.0) Gecko/20100101 Thunderbird/60.7.2 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9382 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1011 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1908290000 definitions=main-1909160176 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 9/16/19 9:49 AM, Cong Wang wrote: > On Mon, Sep 16, 2019 at 6:29 AM syzbot > wrote: >> >> Hello, >> >> syzbot found the following crash on: >> >> HEAD commit: f4b752a6 mlx4: fix spelling mistake "veify" -> "verify" >> git tree: net >> console output: https://syzkaller.appspot.com/x/log.txt?x=16cbebe6600000 >> kernel config: https://syzkaller.appspot.com/x/.config?x=b89bb446a3faaba4 >> dashboard link: https://syzkaller.appspot.com/bug?extid=fae39afd2101a17ec624 >> compiler: gcc (GCC) 9.0.0 20181231 (experimental) >> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10753bc1600000 >> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=111dfc11600000 >> >> The bug was bisected to: >> >> commit b9a1e627405d68d475a3c1f35e685ccfb5bbe668 >> Author: Cong Wang >> Date: Thu Jul 4 00:21:13 2019 +0000 >> >> hsr: implement dellink to clean up resources > > > The crash has nothing to do with this commit. It is probably caused > by the lack of ->laddr_check in rds_loop_transport. > Will have a look. regards, Santosh